A rate control method for hevc coding unit level

A code rate control and encoding unit technology, applied in the field of code rate control at the encoding unit level, can solve problems such as no design, achieve the effect of improving objective quality and accurately assigning the number of bits
CN105554503BInactive Publication Date: 2018-12-18TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2018-12-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an HEVC encoding unit level code rate control method. An encoding unit SubCU further divided by LCU is used for carrying out level code rate control initialization, bit number allocation, encoding parameter estimation and other processes of P frame and B frame encoding units. At first, former LCU encoding information of the same level frame and at the same position is used for predicating whether the current frame LCU is divided. The LCU predicted to be divided, and an R-D model of the SubCU is used for estimating the complexity and the weight in the encoding unit level code rate control initialization part. In a bit number allocation phase, the state of an encoder and the complexity of the current LCU are respectively considered to calculate a target bit number of the current LCU. In an encoding parameter estimation phase, the R-D model of the SubCU is used for estimating the encoding parameter of the current LCU.
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Description

technical field

[0001] The present invention relates to the field of high-performance video coding (High Efficiency Video Coding, HEVC), in particular to a code rate control method at coding unit level. Background technique

[0002] As a key technology in video coding application, rate control algorithm has great value for practical application. In practical applications, the bit rate control algorithm can encode the video according to the target bit rate, so that the actual bit rate after video encoding is close to the target bit rate, and at the same time improve the encoded quality as much as possible. In HEVC, new coding structures such as coding units (Coding Unit, CU) and new technologies such as adaptive sample point compensation are adopted to improve coding efficiency. Correspondingly, a new coding unit-level rate control algorithm should be adopted in HEVC to adapt to the new coding structure and technology of HEVC, and improve the quality of video coding as much ...

Claims

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